Correction, Belgium broke off.
The french ruling class of 1831 created Belgium, as an intermediate step to joining France. However, once Belgium was created they liked it so much that they gave up that idea.
For the longest of time, the Flemish (majority) has been second class citizens. Their culture and language suppressed. As the Flemish are taking back their culture and rights, the balance of power is shifting towards them. The Walloons have at the same time become the best protected minority in the world.
Belgium is experiencing since two years a political crisis, because the Flemish want more regional power. The Walloons want to keep it federal. They are afraid of losing power, influence and especially the yearly money transfers of billons of euros from Flanders to Wallonia. Flanders is one of the richest regions in the world, yet Walloon is a very poor region. In return for the social support, the Walloons spit on our culture and language. They continously threaten the Flemish territorial integrity and refuse to learn Dutch when they settle in Flanders. They are a bunch of arrogant, selfish bastards that threaten the welfare and future of, not only the Flemish people, but the entire Belgium population.